EP 3890198 A1 20211006 - NEAR-FIELD WIRELESS DEVICE
Title (en)
NEAR-FIELD WIRELESS DEVICE
Title (de)
DRAHTLOSE NAHFELDVORRICHTUNG
Title (fr)
DISPOSITIF SANS FIL EN CHAMP PROCHE
Publication
Application
Priority
US 202016839086 A 20200403
Abstract (en)
One example discloses a near-field wireless device, including: a near-field antenna having a first conductive surface and a second conductive surface; wherein the conductive surfaces are configured to carry non-propagating quasi-static near-field electro-induction (NFEI) signals; a tuning circuit coupled to the near-field antenna and having a set of tuning parameters; a controller coupled to the tuning circuit; wherein the controller is configured to monitor a loading of the near-field antenna; wherein the controller is configured to adjust the tuning parameters if the loading is different from a preselected loading; and wherein the controller is configured to set a user present status in response to a predefined threshold change in the set of tuning parameters.
IPC 8 full level
H04B 5/48 (2024.01)
CPC (source: CN EP US)
H04B 5/22 (2024.01 - CN EP); H04B 5/24 (2024.01 - CN); H04B 5/48 (2024.01 - EP US); H04B 5/70 (2024.01 - CN); H04B 5/73 (2024.01 - EP); H04B 5/77 (2024.01 - EP); H04W 4/80 (2018.02 - US)
Citation (search report)
- [XA] EP 2677598 A1 20131225 - BLACKBERRY LTD [CA]
- [A] US 2018083344 A1 20180322 - HAN XU [US], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
US 10917773 B1 20210209; CN 113497642 A 20211012; EP 3890198 A1 20211006; EP 3890198 B1 20231025
DOCDB simple family (application)
US 202016839086 A 20200403; CN 202110358566 A 20210331; EP 21163084 A 20210317